Thank you for your reply, i have done as you explained, however that is not the case, as the boxes were already in the form....
... listings can be submitted, based on those forms, but once posted, can not be edited any more.... ....in any category...
I don't know whot the problem is?..... q2.jpgq1.jpgq3.jpgq4.jpg

Ah right, on the category of Ostalo shown in the picture, you have not selected group list, select Prva Grupa, or create a new one... so move Prva Grupa from group list to the box on the left "Form" and now drop your field lists into the green box(Group list (Prva Grupa)). That should work now. example below